Add 21/4 and 84/7
1st number: 5 1/4, 2nd number: 12 0/7
21/4 + 84/7 is 69/4.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 4 and 7 is 28
Next, find the equivalent fraction of both fractional numbers with denominator 28 - For the 1st fraction, since 4 × 7 = 28,
21/4 = 21 × 7/4 × 7 = 147/28 - Likewise, for the 2nd fraction, since 7 × 4 = 28,
84/7 = 84 × 4/7 × 4 = 336/28 - Add the two like fractions:
147/28 + 336/28 = 147 + 336/28 = 483/28 - 483/28 simplified gives 69/4
- So, 21/4 + 84/7 = 69/4
In mixed form: 171/4
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